摘要
Gust response alleviation is very important for helicopters which have strong coupling and vibration. Gust disturbance not only influences the ride quality and the precision of the weapon delivery, but also affects to the structural fatigue load and the strength. The method of an optimal control law to suppress the gust disturbance for helicopters is presented. The optimization requires the minimization of the vertical overload at the pilot′s seat, the attitude variation and the control energy consumption under the gust disturbance. Based on the original control system, the new system can be easily realized by adding a vertical speed feedback passage. In order to develop the real-time operational flight control system, the optimized control law is written in C language. The hybrid simulations prove that the performance of gust response alleviation and the efficiency of digitalization are satisfactory.
阵风响应缓和研究对于具有强耦合和振动的直升机非常重要 ,阵风扰动不仅影响直升机的乘座品质和武器投放精度 ,而且影响直升机的疲劳载荷和强度。本文提出直升机抑制阵风扰动的最优控制律设计方法。优化性能指标要求在阵风扰动下驾驶员处法向过载、飞机姿态变化以及控制信号能量损耗最小。最终所综合的系统工程实现简便 ,只需在直升机姿态控制系统基础上增加垂直升降速率反馈通道即可。最后使用 C语言实现控制律并进行半物理仿真 ,仿真结果表明 ,控制律优化及数字化实现的效果是令人满意的。
